SU1435835A1 - Method of controlling the pumping plant - Google Patents

Abstract

The invention makes it possible to increase the reliability of the method by preventing unstable modes of operation. The signals of technological parameters in the pressure pipeline 7 are fed to the inputs of the controller (P) 12, where they are compared with signals from the setter 13. If the error exceeds the allowable value, the output signal of the P 12 produces a control signal to adjust the frequency of rotation of the drive 3 of the stabilizing pump unit (ON) I. As a technological parameter, the level of vibration is used. 1. The signals of the vibration 1 are received at the inputs P 15, where they are compared with the signals of the setter 16. Depending on the mismatch The output of the P 15 produces a control signal to the actuator 9 of the flap 8, changing its position leads to a change in the resistance of the pressure pipeline TO 2. T. arr., when the consumption mode in the network 6 changes, causing a reduction in the load of the NA 1 and its approach to unstable modes operation, the device provides a reduction in the load of 2 by covering the shutter 8 and increasing the load on the 1, which prevents unstable modes of its operation. 1 il. sg s ate

Description

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The invention relates to a pump engineering industry, in particular, to systems for controlling water supply pumping stations.

The purpose of the invention is to increase reliability by preventing unstable modes of operation.

The drawing shows a diagram of a pumping station that implements this control method.

The pumping station contains pumping units 1 and 2 with drives 3 and 4 connected to the source 5 of the pumped out fluid and to the network 6, the feed pipe 7, the valve 8 with the drive 9 installed at the outlet of the pumping unit 2, pressure sensors 10 and II flow, connected through the controller 12 with the setting device 13 to the drive 3 of the stabilizing pump unit I, sensors 14 of the vibration of the pump unit 1, connected through the controller 15 with the setting device 16 to the actuator 9 of the valve 8.

The method of controlling a pump station with a stabilizing pump unit 1 is described as follows.

Pump units I and 2 with drives 3 and 4 supply fluid from source 5 through a pressure pipe 7 to network 6. At the same time, the signals of the process parameters — pressure and flow in the pressure pipe. Pipe 7 — enter the inputs of the regulator 12, where they are compared with the signals from the setpoint 13. If the error is greater than the allowable value HjaeT, at the output of regul20

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Simultaneously, the vibration signals of the pump unit 1 from the sensors 14 are fed to the inputs of the regulator 15, where they are compared with the signals of the setter 16. Depending on the error at the output of the regulator 15, a control signal is generated to the actuator 9. This causes the valve 8 to change position and consequently, to a change in the resistance of the pressure pipe of the pump unit 2.

Thus, when changing the mode of consumption in the network 6, causing a decrease in the load of the pump unit 1 and its approach to the region of unstable modes of operation, the device reduces the load of the pump unit 2 by closing the valve 8 and increasing the load of the stabilizing pump unit 1, which prevents unstable modes his works.

Claims (1)

Invention Formula A method of controlling a pumping station with a stabilizing unit, including measuring technological parameters in pipelines, comparing them with set points and, depending on the resulting error, changing the rotational frequency of the stabilizing unit, characterized in that, in order to increase reliability by preventing unstable operating modes, as a technological unit 12, a control signal is generated of a parameter using the vibration level of the stabilizing unit and, according to this parameter, Simulate the resistance of pressure pipelines of other units. Allowance for the adjustment of the frequency of rotation of the drive 3 of the stabilizing pump unit 1. 0 0 five Simultaneously, the vibration signals of the pump unit 1 from the sensors 14 are fed to the inputs of the regulator 15, where they are compared with the signals of the setter 16. Depending on the error at the output of the regulator 15, a control signal is generated to the actuator 9. This causes the valve 8 to change position and consequently, to a change in the resistance of the pressure pipe of the pump unit 2. Thus, when changing the mode of consumption in the network 6, causing a decrease in the load of the pump unit 1 and its approach to the region of unstable modes of operation, the device reduces the load of the pump unit 2 by closing the valve 8 and increasing the load of the stabilizing pump unit 1, which prevents unstable modes his works. Invention Formula A method of controlling a pumping station with a stabilizing unit, including measuring technological parameters in pipelines, comparing them with set points and, depending on the resulting error, changing the rotational frequency of the stabilizing unit, characterized in that, in order to increase reliability by preventing unstable operating modes, as a technological parameter, the level of the vibration parameter is used using the vibration level of the stabilizing unit and, according to this parameter Simulate the resistance of pressure pipelines of other units.